PIF:Quantum Optical Techniques for solid-state quantum information processing

该项目是对可扩展量子计算和通信的新方法的研究。在这种方法中，由几个耦合的量子比特组成的小寄存器通过量子光通信信道相互耦合，这些量子光通信信道可用于建立远程纠缠并在遥远的量子比特之间执行远程操作。 特别是与金刚石中的氮空位（NV）中心相关的单个电子自旋相干耦合到金刚石晶格中的单个附近的碳-13核自旋，将作为量子比特进行探索。电子-核自旋系统可以被相干地操纵，即使在室温下也具有特殊的相干性，这表明了强大的量子存储器的潜力。 拟议项目的具体目标包括：（i）详细了解固态电子和核自旋量子比特的相干特性，并开发精确、相干的量子态操纵技术;（ii）稳健的量子光学纠缠和涉及远程自旋量子比特的量子操作;以及（iii）基于此类系统开发稳健的量子通信和量子计算架构。该项目的最终目标是开发能够容忍大缺陷的高效、可扩展的量子信息处理系统，这项工作涉及来自哈佛大学和德克萨斯A M大学的研究人员团队。 该研究将为量子信息科学（QIS）的知识基础做出重大贡献。除了为量子计算提供新的途径外，实验方法非常适合实现远距离量子通信的中继节点。 该项目为新的跨学科领域的教育和培训提供了绝佳的机会，涉及基础物理，材料科学和设备工程等多个领域的接口。将开发这些领域的创新研究生和本科生课程，并将其与当地学校的外联活动和公开演讲相结合。最后，在这项工作中开发的概念和技术可能会在不同的科学和技术领域有广泛的应用。

This project is an investigation of a new approach to scalable quantum computing and communication. In this approach, small registers consisting of a few coupled quantum bits are coupled to each other by quantum optical communication channels that can be used to establish long-range entanglement and perform remote operations between distant quantum bits. In particular individual electron spins associated with a nitrogen-vacancy (NV) center in diamond coupled coherently to individual nearby carbon-13 nuclear spins in diamond lattice will be explored as qubits. The electron-nuclear spin system can be manipulated coherently and has exceptional coherence properties even at room temperature, indicating a potential for robust quantum memory. Specific goals of the proposed project include (i) detailed understanding of the coherence properties of electron and nuclear spin quantum bits in the solid-state and development of techniques for their accurate, coherent quantum state manipulation; (ii) robust quantum optical entanglement and quantum operations involving remote spin qubits, and (iii) development of robust architectures for quantum communication and quantum computation based on such systems. The ultimate goal of the project is to develop systems for efficient, scalable quantum information processing that can tolerate large imperfections.This work involves a team of researchers from the Harvard University and Texas A&M University. The research will contribute significantly to the knowledge base of Quantum Information Science (QIS). Beyond providing a new avenue toward quantum computation, the experimental approach is ideally suited for the realization of repeater nodes for long-distant quantum communication. The project provides exceptional opportunities for education and training in the new interdisciplinary area involving the interface of several fields of fundamental physics, material science, and device engineering. Innovative graduate and undergraduate courses in these areas will be developed and combined with outreach to local schools and public presentations. Finally, the concepts and techniques developed in this work will likely have a wide range of applications in diverse areas of science and technology.